package day02;

public class DoubleDemo {
    public static void main(String[] args) {
        //3.）双精度浮点型，8个字节
        double a = 3.14;//3.14为小数点直接量，默认为double型
        float b =3.14F;//3.14F为float型直接量

        double c=3.0,d=2.9;
        System.out.println(c-d);//0.100000000,发生舍入误差
        double e = 6.0,f = 4.9;
        System.out.println(e-f);//1.09999999996,发生舍入误差了
        double g =6.0,h=1.9;
        System.out.println(g-h);//4.1,没发生舍入误差
    }
}
